| Summary: | 碩士 === 國立交通大學 === 顯示科技研究所 === 96 === Low power and high image quality have become the major trend of display research in recent years. The contrast ratio of conventional liquid crystal display is limited to the full-on backlight system. Traditionally, the solution is to perform image processing in the low dynamic range display. High dynamic range displays were proposed by adopting the local dimming LED backlight system. Although, it can display high contrast images, but can not optimize power consumption and image quality. In this thesis, we proposed the two color backlight algorithms, DCA and SCC, by controlling R, G, and B LEDs individually to optimize the traditional high dynamic range displays. This method could improve the contrast ratio by reducing dark state and enhance color saturation by reducing the effect of light leakage. Besides, it could reduce more power consumption and keep image details.
This method has been demonstrated that color backlight algorithm implemented on a 37’’ high dynamic range liquid crystal display (HDR-LCD) TV can yield contrast ratio of ~40,000:1 with clear image details. Furthermore, the color gamut can be enlarged to 125% of NTSC and reduced 50% power consumption compared to full-on backlight.
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